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SOLUTION:
Case: Proportions
Given:
A case of soda for $2.50.
Required: Cost of 12 cases.
Method:
[tex]\begin{gathered} 1case\cong2.50 \\ 12cases= \\ \frac{12}{1}\times2.50 \\ =30 \end{gathered}[/tex]Final answer:
12 cases will cost $30